MediaTek chipset drives are pretty good with mediocre discs, too! Uhhh...usually.
As it happens, I have a batch of F16's that I've been slowly working through for awhile, overall no problems as yet personally. All burned at 8x (on a Sammy), except a couple done on an LG DVD recorder.
Mine are Maxell-branded....out of curiosity, what's the brand of your discs, RCM?
EDIT: Got a TRT? Or was the disc tossed.